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Enamel microhardness and fluoride uptake underneath fermenting and non‐fermenting artificial plaque
Author(s) -
TURTOLA L. O.
Publication year - 1977
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1977.tb00568.x
Subject(s) - fermentation , fluoride , enamel paint , indentation hardness , dentistry , chemistry , dental enamel , dental plaque , food science , medicine , crystallography , inorganic chemistry , microstructure
– Washed cells of Streptococcus sanguis were used to form artificial plaque on the surface of bovine enamel and incubated underneath buffer solutions, initial pH 6, for 36 h at 37°C. The decrease in the microhardness of the enamel surface under fermenting “plaque” could be prevented with fluoride. Enamel under a fermenting “plaque” took up significantly more (P < 0.01) fluoride than enamel under a non‐fermenting “plaque” (initial F − in buffer: 10 parts/10 6 ). The) artificial plaque did not accumulate fluoride. Within fermenting “plaques”, the pH decreased significantly more without fluoride ( P <0.01) than with fluoride. Fluoride combined with sucrose more than negated the softening of the enamel caused by sucrose fermentation, i.e. it increased the hardness above the original values. The diffusion of fluoride through the fermenting artificial plaque was more rapid than through a non‐fermenting plaque. These findings suggest that caries‐conducive circumstances may promote fluoride uptake by enamel compared with non‐caries‐conducive circumstances.